South Georgia means you are in the '
local' area for me and John.
He is right on the Bahia, you are probably bringing that in on your car tires. It is commonly planted on the highways and I used to plant it in my pastures for the horses. It usually reseeds itself (sends up a stalk with seeds) every 72 hours.
If you are O.K. with dandelion then just mowing everything the same height and letting grow what ever will grow will probably result in something nice and green. Check out the pictures at the link called 'my projects' at the bottom of my post.
I seeded white clover, let the violets and pennywort grow at will and there were a few other things, like chickweed, plantain, purslane, a pink oxalis and so forth that were dotted about in the mixture of grasses. I did nothing but mow and save the green clippings to mulch my gardens. No watering, no fertilizing, just a mower set on a fairly high setting.
Now I guess I
should check out that link myself - it has been so long that I'm not sure what pictures I have in there.